Pen



FIG. 1 is a perspective view of a pen of the present invention shown with a stand;

FIG. 2 is a front elevation view of the pen;

FIG. 3 is a right side elevation view of the pen, the left side elevation being a mirror image thereof;

FIG. 4 is a rear elevation view of the pen;

FIG. 5 is a top plan view of the pen; and,

FIG. 6 is a bottom plan view of the pen.

The stand shown in phantom lines in FIG. 1 is shown for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for pen, as shown and described. 